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Legal eagles- a moderator question

I recently acquired ( from a very well known gunshop ) a .243 Weatherby and with it bought a new JetZ moderator. Both were on ticket and legally bought. I already have a T8 moderator which is on ticket as a .308 mod. I have just found out that they have sold me a .308 mod. Clearly marked on the box as a .30 cal mod but entered on my ticket as a .243 mod.
This was bought to my attention as my friends T3 is a lot quieter than my rifle.
Legally where do I stand as I now seem to own 2x .30 cal mods with only 1x allowed on ticket

“Man surprised me most about humanity. Because he sacrifices his health in order to make money.Then he sacrifices money to recuperate his health. And then he is so anxious about the future that he does not enjoy the present; the result being that he does not live in the present or the future; he lives as if he is never going to die, and then dies having never really lived.”........Dalai Lama

“Man surprised me most about humanity. Because he sacrifices his health in order to make money.Then he sacrifices money to recuperate his health. And then he is so anxious about the future that he does not enjoy the present; the result being that he does not live in the present or the future; he lives as if he is never going to die, and then dies having never really lived.”........Dalai Lama

1) I think if the mod is marked .30 cal (and not just necessarily by the words .30 cal as some have markings e.g. Wildcat have slots) you have a 'firearms legislation' argument to state that you were sold something other than what your certificate states.

2) Some mods are naturally more efficient when they are calibre specific (i.e. the bore is as close to the nominal bore of the rifle as possible) in which case you have a 'sales of goods' argument that you were sold something other than advertised/totally fit for purpose.

In either case I think your first port of call should be the RFD to see what they say and take it from there...

I have an A-Tec Maxim that was sold to me as an 'Authorised to acquire .222 moderator' and it is marked as a 6.5mm cal mod.
I did query this with Jacksons the importer, the 'phone call was not specifically about this, but during the conversation I mentioned it and was told that the Moderator was made and tested for firearms up to calibre 6.5mm so was safe to use on a .222 calibre rifle. I was happy anyway and only mentioned it in passing so that was the answer.

From my understanding now JetZ only make two moderators. One is for calibres upto 6.5 and one for .30 calibre. The .30 cal will therefore as mentioned on their site be not as efficient in noise reduction.
However it still leaves me with a moderator which I guess technically is designed for use in a more powerful rifle.
Think I'll phone the FEO on Monday as I'd prefer to keep the JetZ, which then leads me onto my next question.

If I dump my .30 cal T8 and use my JetZ for both my SIG (.308) and my Weatherby (.243) how do I enter this on my ticket?

“Man surprised me most about humanity. Because he sacrifices his health in order to make money.Then he sacrifices money to recuperate his health. And then he is so anxious about the future that he does not enjoy the present; the result being that he does not live in the present or the future; he lives as if he is never going to die, and then dies having never really lived.”........Dalai Lama

It's not the mod that is calibre'd - it's the rifle it's purchased for. You don't own 2 x .30 cal mods, you own a centre fire mod for your .243 and a centrefire mod for your .308! (Legally speaking).

my first 17hmr mod was a .22 sak mod; it says ".17 mod" on my ticket - not an error, but rather a case of that mod being a sec 1 mod that I have licenced for that calibre.

my next mod will be a .30 cal sl5, for my 7mm - it will be recorded as a "7mm-08 moderator" as again it is the gun it's licenced for rather than the size of the mods hole!!!

As for mods being quieter when the correct size, yes slightly but not massively! Also when that tight you start to notice accuracy is quicker to deteriorate when the mod gets dirty than with less tight mods. This is more of a problem with some cals than others though.

The ASE will have some etchings on it at the threaded end, including calibre, and manufacture date.

It is quite common to be in the scenario you describe. The moderator is not more powerful as you put it, it simply has a bigger hole, and there is now legal limits on hold large the hole can be for a certain calibre.

The ASE will have some etchings on it at the threaded end, including calibre, and manufacture date.

It is quite common to be in the scenario you describe. The moderator is not more powerful as you put it, it simply has a bigger hole, and there is now legal limits on hold large the hole can be for a certain calibre.

I agree with this post. In relation to the firearms licensing aspect of the original question, there should not be an issue. Specifying a calibre is more about relating a moderator to a particular rifle and administrative convenience on the National Firearms Licensing Management System (NFLMS) than any other aspect.
In a situation where a certificate holder wishes to use a moderator on more than one rifle, I have applied the following in the conditions to assist.....'The .308 sound moderator may also be used with the 30-06 and .243 rifles ' (for example). I think having something similar would help to allay any fears of falling foul of the law.
However in view of the differences in police forces, I think the original poster is sensible to consult the firearms unit.